<?php
/**
 * jsmin.php - PHP implementation of Douglas Crockford's JSMin.
 *
 * This is pretty much a direct port of jsmin.c to PHP with just a few
 * PHP-specific performance tweaks. Also, whereas jsmin.c reads from stdin and
 * outputs to stdout, this library accepts a string as input and returns another
 * string as output.
 *
 * PHP 5 or higher is required.
 *
 * Permission is hereby granted to use this version of the library under the
 * same terms as jsmin.c, which has the following license:
 *
 * --
 * Copyright (c) 2002 Douglas Crockford	(www.crockford.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * The Software shall be used for Good, not Evil.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * --
 *
 * @package JSMin
 * @author Ryan Grove <ryan@wonko.com>
 * @copyright 2002 Douglas Crockford <douglas@crockford.com> (jsmin.c)
 * @copyright 2008 Ryan Grove <ryan@wonko.com> (PHP port)
 * @license http://opensource.org/licenses/mit-license.php MIT License
 * @version 1.1.1 (2008-03-02)
 * @link http://code.google.com/p/jsmin-php/
 */
class JSMin {
	const ORD_LF		= 10;
	const ORD_SPACE = 32;
	protected $a					 = '';
	protected $b					 = '';
	protected $input			 = '';
	protected $inputIndex	= 0;
	protected $inputLength = 0;
	protected $lookAhead	 = null;
	protected $output			= '';
	
	// -- Public Static Methods --------------------------------------------------
	public static function minify($js) {
		$jsmin = new JSMin($js);
		return $jsmin->min();
	}
	
	// -- Public Instance Methods ------------------------------------------------
	public function __construct($input) {
		$this->input			 = str_replace("\r\n", "\n", $input);
		$this->inputLength = strlen($this->input);
	}
	
	// -- Protected Instance Methods ---------------------------------------------
	protected function action($d) {
		switch($d) {
			case 1:
				$this->output .= $this->a;
			case 2:
				$this->a = $this->b;
				if ($this->a === "'" || $this->a === '"') {
					for (;;) {
						$this->output .= $this->a;
						$this->a			 = $this->get();
						if ($this->a === $this->b) {
							break;
						}
						if (ord($this->a) <= self::ORD_LF) {
							throw new JSMinException('Unterminated string literal.');
						}
						if ($this->a === '\\') {
							$this->output .= $this->a;
							$this->a			 = $this->get();
						}
					}
				}
			case 3:
				$this->b = $this->next();
				if ($this->b === '/' && (
						$this->a === '(' || $this->a === ',' || $this->a === '=' ||
						$this->a === ':' || $this->a === '[' || $this->a === '!' ||
						$this->a === '&' || $this->a === '|' || $this->a === '?')) {
					$this->output .= $this->a . $this->b;
					for (;;) {
						$this->a = $this->get();
						if ($this->a === '/') {
							break;
						} elseif ($this->a === '\\') {
							$this->output .= $this->a;
							$this->a			 = $this->get();
						} elseif (ord($this->a) <= self::ORD_LF) {
							throw new JSMinException('Unterminated regular expression '.
									'literal.');
						}
						$this->output .= $this->a;
					}
					$this->b = $this->next();
				}
		}
	}

	protected function get() {
		$c = $this->lookAhead;
		$this->lookAhead = null;	
		if ($c === null) {
			if ($this->inputIndex < $this->inputLength) {
				$c = substr($this->input, $this->inputIndex, 1);
				$this->inputIndex += 1;
			} else {
				$c = null;
			}
		}
		if ($c === "\r") {
			return "\n";
		}
		if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {
			return $c;
		}
		return ' ';
	}

	protected function isAlphaNum($c) {
		return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;
	}

	protected function min() {
		$this->a = "\n";
		$this->action(3);
		while ($this->a !== null) {
			switch ($this->a) {
				case ' ':
					if ($this->isAlphaNum($this->b)) {
						$this->action(1);
					} else {
						$this->action(2);
					}
					break;
				case "\n":
					switch ($this->b) {
						case '{':
						case '[':
						case '(':
						case '+':
						case '-':
							$this->action(1);
							break;
						case ' ':
							$this->action(3);
							break;
						default:
							if ($this->isAlphaNum($this->b) || $this->b=="!") {
								$this->action(1);
							}
							else {
								$this->action(2);
							}
					}
					break;
				default:
					switch ($this->b) {
						case ' ':
							if ($this->isAlphaNum($this->a)) {
								$this->action(1);
								break;
							}
							$this->action(3);
							break;
						case "\n":
							switch ($this->a) {
								case '}':
								case ']':
								case ')':
								case '+':
								case '-':
								case '"':
								case "'":
									$this->action(1);
									break;
								default:
									if ($this->isAlphaNum($this->a)) {
										$this->action(1);
									}
									else {
										$this->action(3);
									}
							}
							break;
						default:
							$this->action(1);
							break;
					}
			}
		}
		return $this->output;
	}

	protected function next() {
		$c = $this->get();
		if ($c === '/') {
			switch($this->peek()) {
				case '/':
					for (;;) {
						$c = $this->get();
						if (ord($c) <= self::ORD_LF) {
							return $c;
						}
					}
				case '*':
					$this->get();
					for (;;) {
						switch($this->get()) {
							case '*':
								if ($this->peek() === '/') {
									$this->get();
									return ' ';
								}
								break;
							case null:
								throw new JSMinException('Unterminated comment.');
						}
					}
				default:
					return $c;
			}
		}
		return $c;
	}

	protected function peek() {
		$this->lookAhead = $this->get();
		return $this->lookAhead;
	}
}
// -- Exceptions ---------------------------------------------------------------
class JSMinException extends Exception {}

/**
 * cssmin.php - A simple CSS minifier.
 * --
 * 
 * <code>
 * include("cssmin.php");
 * file_put_contents("path/to/target.css", cssmin::minify(file_get_contents("path/to/source.css")));
 * </code>
 * --
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * --
 *
 * @package 	cssmin
 * @author 		Joe Scylla <joe.scylla@gmail.com>
 * @copyright 	2008 Joe Scylla <joe.scylla@gmail.com>
 * @license 	http://opensource.org/licenses/mit-license.php MIT License
 * @version 	1.0 (2008-01-31)
 */
class CSSMin {
	/**
	 * Minifies stylesheet definitions
	 *
	 * @param 	string	$v	Stylesheet definitions as string
	 * @return 	string		Minified stylesheet definitions
	 */
	public static function minify($v) {
		$v = trim($v);
		$v = str_replace("\r\n", "\n", $v);
				$search = array("/\/\*[\d\D]*?\*\/|\t+/", "/\s+/", "/\}\s+/");
				$replace = array(null, " ", "}\n");
		$v = preg_replace($search, $replace, $v);
		$search = array("/\\;\s/", "/\s+\{\\s+/", "/\\:\s+\\#/", "/,\s+/i", "/\\:\s+\\\'/i", "/\\:\s+([0-9]+|[A-F]+)/i");
				$replace = array(";", "{", ":#", ",", ":\'", ":$1");
				$v = preg_replace($search, $replace, $v);
				$v = str_replace("\n", null, $v);
			return $v;	
	}
}
?>